Controllable Heterogenous Seeding-Induced Crystallization for High-Efficiency FAPbI3-Based Perovskite Solar Cells Over 24%

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Hengkai Zhang
  • Zhiwei Ren
  • Kuan Liu
  • Minchao Qin
  • Zehan Wu
  • Yaokang Zhang
  • Hrisheekesh Thachoth Chandran
  • Jianhua Hao
  • Xinhui Lu
  • Zijian Zheng
  • Jinsong Huang
  • Gang Li

Detail(s)

Original languageEnglish
Article number2204366
Journal / PublicationAdvanced Materials
Volume34
Issue number36
Online published22 Jul 2022
Publication statusPublished - 8 Sep 2022

Abstract

The addition of small seeding particles into a supersaturated solution is one among the most effective approaches to obtain high-quality semiconductor materials via increased crystallization rates. However, limited study is conducted on this approach for the fabrication of perovskite solar cells. Here, a new strategy—“heterogenous seeding-induced crystallization (hetero-SiC)” to assist the growth of FAPbI3-based perovskite is proposed. In this work, di-tert-butyl(methyl)phosphonium tetrafluoroborate is directly introduced into the precursor, which forms a low-solubility complex with PbI2. The low-solubility complex can serve as the seed to induce crystallization of the perovskite during the solvent-evaporation process. Various in situ measurement tools are used to visualize the hetero-SiC process, which is shown to be an effective way of manipulating the nucleation and crystal growth of perovskites. The hetero-SiC process greatly improves the film quality, reduces film defects, and suppresses nonradiative recombination. A hetero-SIC proof-of-concept device exhibits outstanding performance with 24.0% power conversion efficiency (PCE), well over the control device with 22.2% PCE. Additionally, hetero-SiC perovskite solar cell (PSC) stability under light illumination is enhanced and the PSC retains 84% of its initial performance after 1400 h of light illumination.

Research Area(s)

  • heterogenous seeding-induced crystallization, perovskite solar cells, α-FAPbI 3

Citation Format(s)

Controllable Heterogenous Seeding-Induced Crystallization for High-Efficiency FAPbI3-Based Perovskite Solar Cells Over 24%. / Zhang, Hengkai; Ren, Zhiwei; Liu, Kuan; Qin, Minchao; Wu, Zehan; Shen, Dong; Zhang, Yaokang; Chandran, Hrisheekesh Thachoth; Hao, Jianhua; Lee, Chun-sing; Lu, Xinhui; Zheng, Zijian; Huang, Jinsong; Li, Gang.

In: Advanced Materials, Vol. 34, No. 36, 2204366, 08.09.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review